#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#ifdef LOCAL
#include <algo/debug.h>
#else
#define debug(...) void(0)
#endif
#include<atcoder/all>
using namespace atcoder;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int a, b, x; cin >> a >> b >> x;
    cout << (x + a - 1) / a * b << endl;
}